Used oil re-refining

Details Used oil re-refining Used oil re-refining

C - Chemistry, Metallurgy

10

M

196/200

C10M 175/02 (2006.01)

Patent

CA 1209512

ABSTRACT OF THE DISCLOSURE Used oils, especially used lubricating oils which are normally considered waste and are discarded or burned, are reclaimed for reuse by a re-refining procedure involving the steps of: (a) heat soaking the used oil; (b) optionally stripping the heat soaked oil under conditions sufficient to remove the low boiling conversion products from the heat soaker, (c) distilling the heat soaked oil; (d) passing the distillate through a guard bed of activated materials; (e) hydrotreating the guard bed treated dis- tillate under standard hydrotreating conditions. If the used oil to be rerefined contains a quantity of water and/or fuel fraction which the prac- titioner considers sufficiently large to be detrimen- tal, the used oil may be subjected to a dewatering/defueling step prior to being heat soaked.

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